This study determined whether maximal squat training using high loads, few repetitions, and maximal mobilization of force, improved running economy and endurance performances. Female soccer players (N = 24) were divided into a training group (exercises with a load >85% 1-RM focusing on maximal mobilization of force in the concentric contraction phase) and a control group. Soccer training continued during the training period.

Maximal strength training (mobilization emphasis) improved 1-RM by 33.7% and rate of force development by 52.3%. Running economy at anaerobic threshold improved by 4.7% while no change was observed in the control group. Other measures suggested that the adaptations to the training were neural in nature, altering recruitment patterns.